AT&T seems to be going the Windows Phone 7 way more and more, since we’ve spotted at least 3 brand new smartphones with Microsoft’s mobile OS on board and AT&T branding. Another one of these handsets just surfaced, the HTC T8788, a model you can see pictured in the images below.

This is a landscape slider, but strangely enough the sliding part doesn’t reveal a keyboard, opting for a speaker instead. Such an interesting concept was seen before on Samsung Highnote, making the device a nifty media-focused smartphone. Overall, this is a pretty phone, but that space from the sliding part seems a bit wasted, don’t you think?